Easier access to scientific data
Brought to you by NOAA NMFS SWFSC ERD
|
ERDDAP
Easier access to scientific data |
Brought to you by NOAA NMFS SWFSC ERD |
| Dataset Title: | comet-20210907T1333 Real Time Raw Time Series
|
| Institution: | Helmholtz-Zentrum hereon (Dataset ID: comet-20210907T1333-trajectory-raw-rt) |
| Information: | Summary
| License
| FGDC
| ISO 19115
| Metadata
| Background
| Subset
| Files
| Make a graph
|
Attributes {
s {
time {
UInt32 _ChunkSizes 221;
String _CoordinateAxisType "Time";
Float64 actual_range 1.63102162438013e+9, 1.63198669259641e+9;
String axis "T";
Int32 bytes 8;
String calendar "gregorian";
String comment "Alias for m_present_time";
String ioos_category "Time";
String long_name "m_present_time";
String source_sensor "m_present_time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
Float64 valid_max 2.147483647e+9;
Float64 valid_min 0.0;
}
latitude {
UInt32 _ChunkSizes 221;
String _CoordinateAxisType "Lat";
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range 38.61102833333334, 39.370448333333336;
String axis "Y";
Int32 bytes 8;
String comment "m_gps_lat converted to decimal degrees and interpolated";
String ioos_category "Location";
String long_name "Latitude";
String observation_type "calculated";
Int32 precision 5;
String source_sensor "m_gps_lat";
String standard_name "latitude";
String units "degrees_north";
Float64 valid_max 90.0;
Float64 valid_min -90.0;
}
longitude {
UInt32 _ChunkSizes 221;
String _CoordinateAxisType "Lon";
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range -74.201075, -73.001755;
String axis "X";
Int32 bytes 8;
String comment "m_gps_lon converted to decimal degrees and interpolated";
String ioos_category "Location";
String long_name "Longitude";
String observation_type "calculated";
Int32 precision 5;
String source_sensor "m_gps_lon";
String standard_name "longitude";
String units "degrees_east";
Float64 valid_max 180.0;
Float64 valid_min -180.0;
}
depth {
UInt32 _ChunkSizes 221;
String _CoordinateAxisType "Height";
String _CoordinateZisPositive "down";
Float32 _FillValue 9.96921e+36;
Float32 actual_range 0.0, 106.6897;
String axis "Z";
String comment "Calculated from llat_pressure and llat_latitude using gsw.z_from_p";
String ioos_category "Location";
String long_name "CTD Depth";
String observation_type "calculated";
String positive "down";
String reference_datum "sea-surface";
String source_sensor "llat_pressure,llat_latitude";
String standard_name "depth";
String units "m";
Float32 valid_max 2000.0;
Float32 valid_min 0.0;
}
trajectory {
UInt32 _ChunkSizes 19;
String cf_role "trajectory_id";
String comment "A trajectory is a single deployment of a glider and may span multiple data files.";
String ioos_category "Identifier";
String long_name "Trajectory/Deployment Name";
}
source_file {
UInt32 _ChunkSizes 32;
String all_sensors "0";
String comment "Name of the source data file and associated file metadata";
String dbd_label "DBD_ASC(dinkum_binary_data_ascii)file";
String encoding_ver "2";
Int32 file_size_bytes 29464;
String filename "comet-2021-256-1-5";
String filename_extension "sbd";
String filename_label "comet-2021-256-1-5-sbd(02450005)";
String fileopen_time "Sat_Sep_18_17:15:52_2021";
String ioos_category "Unknown";
String long_name "Source data file";
String mission_name "lastgasp.mi";
String num_ascii_tags "14";
String num_label_lines "3";
String num_segments "1";
String segment_filename_0 "comet-2021-256-1-5";
String sensors_per_cycle "25";
String source_file "/home/coolgroup/slocum/deployments/2021/comet-20210907T1333/data/in/ascii/sbd/comet_2021_256_1_5_sbd.dat";
String the8x3_filename "02450005";
}
platform {
Int32 _FillValue -2147483647;
String comment "Helmholtz-Zentrum hereon glider";
String depth_rating "200m";
String glider_type "Teledyne Webb Research Slocum G2 glider";
String id "comet";
String instruments "instrument_ctd,instrument_flntu";
String ioos_category "Unknown";
String long_name "Slocum Glider comet";
String os_version "8.2";
String owner "Helmholtz-Zentrum hereon";
String type "platform";
String wmo_id "4803941";
String wmo_platform_code "4803941";
}
instrument_ctd {
Int32 _FillValue -2147483647;
String calibration_date "2021-01-01";
String comment "Pumped";
String factory_calibrated "2021-01-01";
String ioos_category "Identifier";
String long_name "Conductivity, Temperature, Depth (CTD) Sensor";
String make_model "Sea-Bird GPCTD";
String owner "Helmholtz-Zentrum hereon";
String platform "platform";
String serial_number "9219";
String type "instrument";
}
instrument_flntu {
Int32 _FillValue -2147483647;
String calibration_date "2014-07-01";
String comment "ECO FLNTU Chlorophyll a and turbidity sensor";
String factory_calibrated "2014-07-01";
String ioos_category "Identifier";
String long_name "ECO FLNTU Instrument";
String make_model "ECO-FLNTU(RT) combined fluorometer and turbidity sensor";
String owner "Helmholtz-Zentrum hereon";
String platform "platform";
String serial_number "3654";
String type "instrument";
}
c_wpt_lat {
UInt32 _ChunkSizes 512;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range 0.0, 3900.7197;
Int32 bytes 8;
String ioos_category "Location";
String long_name "c_wpt_lat";
String sensor "c_wpt_lat";
String source_sensor "c_wpt_lat";
String type "f8";
String units "lat";
}
c_wpt_lon {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range -7338.7928, 0.0;
Int32 bytes 8;
String ioos_category "Location";
String long_name "c_wpt_lon";
String sensor "c_wpt_lon";
String source_sensor "c_wpt_lon";
String type "f8";
String units "lon";
}
crs {
Int32 _FillValue -2147483647;
String epsg_code "EPSG:4326";
String grid_mapping_name "latitude_longitude";
Float64 inverse_flattening 298.257223563;
String ioos_category "Unknown";
String long_name "http://www.opengis.net/def/crs/EPSG/0/4326";
Float64 semi_major_axis 6378137.0;
}
m_ballast_pumped {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -202.068, 538.375;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "m_ballast_pumped";
String sensor "m_ballast_pumped";
String source_sensor "m_ballast_pumped";
String type "f4";
String units "cc";
}
m_battery_inst {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 11.9839, 13.9358;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "m_battery_inst";
String sensor "m_battery_inst";
String source_sensor "m_battery_inst";
String type "f4";
String units "volts";
}
m_battpos {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.266469, 1.47663;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "m_battpos";
String sensor "m_battpos";
String source_sensor "m_battpos";
String type "f4";
String units "in";
}
m_depth {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 0.0, 106.871;
String axis "Z";
Int32 bytes 4;
String comment "Glider pressure transducer measured pressure";
String ioos_category "Location";
String long_name "Depth";
String observation_type "calculated";
String positive "down";
String reference_datum "sea-surface";
String source_sensor "m_depth";
String standard_name "depth";
String units "m";
Float32 valid_max 2000.0;
Float32 valid_min 0.0;
}
m_gps_lat {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range 3836.6617, 3922.2269;
String axis "Y";
Int32 bytes 8;
String comment "Latitude measured using on-board GPS. NMEA coordinates.";
String ioos_category "Time";
String long_name "GPS Measured Latitude";
String observation_type "measured";
Int32 precision 5;
String source_sensor "m_gps_lat";
String units "degrees_minutes_north";
Float64 valid_max 9000.0;
Float64 valid_min -9000.0;
}
m_gps_lon {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range -7412.0645, -7300.1053;
String axis "X";
Int32 bytes 8;
String comment "Longitude measured using on-board GPS. NMEA coordinates.";
String ioos_category "Time";
String long_name "GPS Measured Longitude";
String observation_type "measured";
Int32 precision 5;
String source_sensor "m_gps_lon";
String units "degrees_minutes_east";
Float64 valid_max 18000.0;
Float64 valid_min -18000.0;
}
m_lat {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range 3836.70520005907, 3922.22690006105;
String axis "Y";
Int32 bytes 8;
String comment "Dead-reckoned latitude calculated by the glider while underwater. NMEA coordinates";
String ioos_category "Time";
String long_name "Dead-Reckoned Latitude";
String observation_type "calculated";
Int32 precision 5;
String source_sensor "m_lat";
String standard_name "latitude";
String units "degrees_minutes_north";
Float64 valid_max 9000.0;
Float64 valid_min -9000.0;
}
m_leakdetect_voltage {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 2.47811, 2.48639;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "m_leakdetect_voltage";
String sensor "m_leakdetect_voltage";
String source_sensor "m_leakdetect_voltage";
String type "f4";
String units "volts";
}
m_lon {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range -7412.06449999928, -7259.60464398001;
String axis "X";
Int32 bytes 8;
String comment "Dead-reckoned longitude calculoned by the glider while underwater. NMEA coordinates";
String ioos_category "Time";
String long_name "Dead-Reckoned Longitude";
String observation_type "calculated";
Int32 precision 5;
String source_sensor "m_lon";
String standard_name "longitude";
String units "degrees_minutes_east";
Float64 valid_max 18000.0;
Float64 valid_min -18000.0;
}
m_pitch {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.680678, 0.558505;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "m_pitch";
String sensor "m_pitch";
String source_sensor "m_pitch";
String type "f4";
String units "rad";
}
m_present_time {
UInt32 _ChunkSizes 221;
Float64 actual_range 1.63102162438013e+9, 1.63198669259641e+9;
String axis "T";
Int32 bytes 8;
String calendar "gregorian";
String ioos_category "Time";
String long_name "m_present_time";
String source_sensor "m_present_time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
Float64 valid_max 2.147483647e+9;
Float64 valid_min 0.0;
}
m_roll {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.689405, 0.230383;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "m_roll";
String sensor "m_roll";
String source_sensor "m_roll";
String type "f4";
String units "rad";
}
m_speed {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.760857, 0.953184;
Int32 bytes 4;
String ioos_category "Currents";
String long_name "m_speed";
String sensor "m_speed";
String source_sensor "m_speed";
String type "f4";
String units "m/s";
}
m_water_vx {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.197737, 0.169036;
Int32 bytes 4;
String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater. The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
String ioos_category "Currents";
String long_name "Depth-averaged Eastward Sea Water Velocity";
String observation_type "calculated";
String source_sensor "m_water_vx";
String standard_name "eastward_sea_water_velocity";
String units "m s-1";
Float32 valid_max 10.0;
Float32 valid_min -10.0;
}
m_water_vy {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.20137, 0.164402;
Int32 bytes 4;
String comment "The depth-averaged current is an estimate of the net current measured while the glider is underwater. The value is calculated over the entire underwater segment, which may consist of 1 or more dives.";
String ioos_category "Currents";
String long_name "Depth-averaged Northward Sea Water Velocity";
String observation_type "calculated";
String source_sensor "m_water_vy";
String standard_name "northward_sea_water_velocity";
String units "m s-1";
Float32 valid_max 10.0;
Float32 valid_min -10.0;
}
pressure {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 0.0, 107.53;
String axis "Z";
Int32 bytes 4;
String comment "Alias for sci_water_pressure, multiplied by 10 to convert from bar to dbar";
String ioos_category "Pressure";
String long_name "CTD Pressure";
String observation_type "measured";
String positive "down";
String reference_datum "sea-surface";
String source_sensor "sci_water_pressure";
String standard_name "sea_water_pressure";
String units "bar";
Float32 valid_max 2000.0;
Float32 valid_min 0.0;
}
sci_flntu_chlor_units {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.0484, 0.0;
Int32 bytes 4;
String ioos_category "Ocean Color";
String long_name "sci_flntu_chlor_units";
String sensor "sci_flntu_chlor_units";
String source_sensor "sci_flntu_chlor_units";
String type "f4";
String units "ug/l";
}
sci_flntu_turb_units {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range -0.012, 0.732;
Int32 bytes 4;
String ioos_category "Unknown";
String long_name "sci_flntu_turb_units";
String sensor "sci_flntu_turb_units";
String source_sensor "sci_flntu_turb_units";
String type "f4";
String units "NTU";
}
sci_m_present_time {
UInt32 _ChunkSizes 221;
Float64 actual_range 1.63102162438013e+9, 1.63198669259641e+9;
String axis "T";
Int32 bytes 8;
String calendar "gregorian";
String ioos_category "Time";
String long_name "sci_m_present_time";
String source_sensor "sci_m_present_time";
String standard_name "time";
String time_origin "01-JAN-1970 00:00:00";
String units "seconds since 1970-01-01T00:00:00Z";
Float64 valid_max 2.147483647e+9;
Float64 valid_min 0.0;
}
sci_water_cond {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 0.0, 5.28755;
Int32 bytes 4;
String ioos_category "Salinity";
String long_name "sci_water_cond";
String observation_type "measured";
String source_sensor "sci_water_cond";
String standard_name "sea_water_electrical_conductivity";
String units "S m-1";
Float32 valid_max 10.0;
Float32 valid_min 0.0;
}
sci_water_pressure {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 0.0, 10.753;
String axis "Z";
Int32 bytes 4;
String ioos_category "Pressure";
String long_name "CTD Pressure";
String observation_type "measured";
String positive "down";
String reference_datum "sea-surface";
String source_sensor "sci_water_pressure";
String standard_name "sea_water_pressure";
String units "bar";
Float32 valid_max 2000.0;
Float32 valid_min 0.0;
}
sci_water_temp {
UInt32 _ChunkSizes 221;
Float32 _FillValue 9.96921e+36;
Float32 actual_range 0.0, 26.2673;
Int32 bytes 4;
String ioos_category "Temperature";
String long_name "sci_water_temp";
String observation_type "measured";
String source_sensor "sci_water_temp";
String standard_name "sea_water_temperature";
String units "Celsius";
Float32 valid_max 40.0;
Float32 valid_min -5.0;
}
x_last_wpt_lat {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range 3851.9123, 4305.75;
Int32 bytes 8;
String ioos_category "Location";
String long_name "x_last_wpt_lat";
String sensor "x_last_wpt_lat";
String source_sensor "x_last_wpt_lat";
String type "f8";
String units "lat";
}
x_last_wpt_lon {
UInt32 _ChunkSizes 221;
Float64 _FillValue 9.96920996838687e+36;
Float64 actual_range -7338.7928, 522.45;
Int32 bytes 8;
String ioos_category "Location";
String long_name "x_last_wpt_lon";
String sensor "x_last_wpt_lon";
String source_sensor "x_last_wpt_lon";
String type "f8";
String units "lon";
}
}
NC_GLOBAL {
String _NCProperties "version=1|netcdflibversion=4.6.1|hdf5libversion=1.10.3";
String acknowledgment "This deployment is supported by funding from NOAA Award #NA19OAR0220189, and is coordinated between a partnership of IOOS, OAR, AOML, Navy, academic researchers, and private industry and PoF-IV of the Helmholtz Association, Germany.";
String cdm_data_type "Trajectory";
String cdm_trajectory_variables "trajectory";
String comment "Deployed by Nicole Waite and Dave Aragon with boat captain Chip Haldeman aboard the R/V Arabella out of Tuckerton, NJ, USA";
String contributor_name "Travis Miles, Lucas Merckelbach, Jeffrey Carpenter, Johannes Becherer, Dave Aragon, Nicole Waite, Chip Haldeman, Mariana Lage, Joe Gradone, John Kerfoot, Laura Nazzaro, Lori Garzio";
String contributor_role "Principal Investigator, Principal Investigator, Principal Investigator, Glider Pilot, Glider Pilot, Glider Pilot, Glider Pilot and Vessel Captain, Graduate Student, Graduate Student, Data Management, Data Management, Data Management";
String Conventions "CF-1.6, COARDS, ACDD-1.3";
String creator_email "kerfoot@marine.rutgers.edu";
String creator_institution "Rutgers University";
String creator_name "John Kerfoot";
String creator_type "person";
String creator_url "https://rucool.marine.rutgers.edu";
String date_created "2021-09-18T18:35:09Z";
String date_issued "2021-09-18T18:35:09Z";
String date_modified "2021-09-18T18:35:09Z";
String defaultGraphQuery "longitude,latitude,time&.draw=markers&.marker=6%7C3&.color=0xFFFFFF&.colorBar=Rainbow2%7C%7C%7C%7C%7C&.bgColor=0xffccccff";
String deployment_name "comet-20210907T1333";
Float64 Easternmost_Easting -73.001755;
String featureType "Trajectory";
String geospatial_bounds "POLYGON ((38.61175333333333 -73.50813666666666, 38.61175333333333 -73.50279333333333, 38.61102833333334 -73.50279333333333, 38.61102833333334 -73.50813666666666, 38.61175333333333 -73.50813666666666))";
String geospatial_bounds_crs "EPSG:4326";
String geospatial_bounds_vertical_crs "EPSG:5831";
Float64 geospatial_lat_max 39.370448333333336;
Float64 geospatial_lat_min 38.61102833333334;
String geospatial_lat_resolution "0.00001 degree";
String geospatial_lat_units "degrees_north";
Float64 geospatial_lon_max -73.001755;
Float64 geospatial_lon_min -74.201075;
String geospatial_lon_resolution "0.00001 degree";
String geospatial_lon_units "degrees_east";
Int32 geospatial_verical_resolution 0;
Float64 geospatial_vertical_max 106.6897;
Float64 geospatial_vertical_min 0.0;
String geospatial_vertical_positive "down";
String geospatial_vertical_units "m";
String gts_ingest "true";
String history
"2021-09-18T18:35:09Z: /tmp/tmp0ewf8gcm/TrajectoryNetCDFWriter.pyr8k6n06_.nc created
2021-09-18T18:35:09Z: /home/kerfoot/code/glider-proc/scripts/proc_deployment_trajectories_to_nc.py /home/coolgroup/slocum/deployments/2021/comet-20210907T1333/data/in/ascii/sbd/comet_2021_256_1_5_sbd.dat
2024-12-22T13:33:41Z (local files)
2024-12-22T13:33:41Z http://slocum-data.marine.rutgers.edu/erddap/tabledap/comet-20210907T1333-trajectory-raw-rt.html";
String id "comet-20210907T1333";
String infoUrl "https://www.hereon.de/index.php.en,https://marine.rutgers.edu/cool/data/gliders/deployments";
String institution "Helmholtz-Zentrum hereon";
String instrument "In Situ/Laboratory Instruments > Profilers/Sounders > CTD";
String instrument_vocabulary "NASA/GCMD Instrument Keywords Version 8.5";
String keywords_vocabulary "NASA/GCMD Earth Sciences Keywords Version 8.5";
String license "This data may be redistributed and used without restriction. Data provided as is with no expressed or implied assurance of quality assurance or quality control";
String naming_authority "edu.rutgers.rucool";
String ncei_template_version "NCEI_NetCDF_Trajectory_Template_v2.0";
Float64 Northernmost_Northing 39.370448333333336;
String platform "In Situ Ocean-based Platforms > AUVS > Autonomous Underwater Vehicles";
String platform_type "Slocum Glider";
String platform_vocabulary "NASA/GCMD Platforms Keywords Version 8.5";
String processing_level "Raw Slocum glider time-series dataset from the native data file format. No quality control provided.";
String product_version "1.0";
String program "Hurricane Glider Program";
String project "Sustained Underwater Glider Observations for Improving Atlantic Tropical Cyclone Intensity Forecast";
String publisher_email "kerfoot@marine.rutgers.edu";
String publisher_institution "Rutgers University";
String references "https://www.hereon.de/index.php.en,https://marine.rutgers.edu/cool/data/gliders/deployments";
String sea_name "Mid-Atlantic Bight";
String source "Observational Slocum glider data from source dba file comet-2021-256-1-5-sbd(02450005)";
String sourceUrl "(local files)";
Float64 Southernmost_Northing 38.61102833333334;
String standard_name_vocabulary "CF Standard Name Table v27";
String subsetVariables "source_file";
String summary "This project supports the deployment and realtime data delivery of autonomous underwater gliders in the coastal ocean to better resolve and understand essential ocean features and processes that contribute to hurricane intensification or weakening prior to making landfall. Glider Comet is being deployed within the highly stratified Mid Atlantic Bight during the 2021 hurricane season with the goal of sampling ocean mixing during summer tropical cyclones or fall transition storms using an integrated Rockland Scientific, Inc Microstructure Profiler. Real-time data will support ongoing NOAA/NWS operational ocean modeling during hurricanes, while post-storm analysis will improve our understanding of ocean mixing processes.";
String time_coverage_duration "PT23M26.88758S";
String time_coverage_end "2021-09-18T17:38:12Z";
String time_coverage_resolution "PT06S";
String time_coverage_start "2021-09-07T13:33:44Z";
String title "comet-20210907T1333 Real Time Raw Time Series";
String uuid "a3865ef4-e881-4d9c-8205-91f7e765e1f0";
Float64 Westernmost_Easting -74.201075;
String wmo_id "4803941";
String wmo_platform_code "4803941";
}
}
Data Access Protocol (DAP) and its
selection constraints.
The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.
Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names,
followed by a collection of
constraints (e.g., variable<value),
each preceded by '&' (which is interpreted as "AND").
For details, see the tabledap Documentation.